Summary of Business and Significant Accounting Policies (Acctg Policies) (Details) - USD ($) $ in Thousands	Jun. 24, 2016	Dec. 25, 2015
Recently Adopted Accounting Standards
Equity securities currently accounted for under the cost method of accounting	$ 3,500
Deferred tax asset, noncurrent	$ 337,506	$ 255,385
Previously reported
Recently Adopted Accounting Standards
Deferred tax asset, noncurrent		246,700
Deferred tax asset, current		8,700
Adjustments for New Accounting Principle, Early Adoption | Accounting Standards Update 2015-17
Recently Adopted Accounting Standards
Deferred tax asset, noncurrent		$ 255,400